Explorer 1 became the first successfully launched satellite by the United States when it was sent to space on 31 January 1958. A quick response to the Soviet Union’s launch of Sputnik 1, Explorer 1’s ...

We can make out a few subtle changes to the front and rear ends of the new Explorer from the batch of spy photos, which reveal the vehicle completely undisguised. While the sides are ...

Explorer 1 became the first successfully launched satellite by the United States when it was sent to space on 31 January 1958. A quick response to the Soviet Union’s launch of Sputnik 1 ...